CN109841391B

CN109841391B - Winding component

Info

Publication number: CN109841391B
Application number: CN201811131240.XA
Authority: CN
Inventors: 北谷一治; 山崎清美; 五十岚友一
Original assignee: TDK Corp
Current assignee: TDK Corp
Priority date: 2017-11-24
Filing date: 2018-09-27
Publication date: 2022-02-25
Anticipated expiration: 2038-09-27
Also published as: JP2019096749A; CN109841391A; JP7035482B2; US11232897B2; US20190164688A1

Abstract

The invention provides a winding component which can reduce the installation area even in the condition of winding a plurality of windings at one time by an automatic winding machine. A first terminal (115a) connected to a first winding and second terminals (115c, 115d) connected to a second winding requiring insulation from the first winding protrude from a bobbin (113) by at least 2 pieces each, and the arrangement of these terminals is arranged in a row (L1) in the order of "first terminal (115a) → first terminal (115b) → second terminal (115c) → second terminal (115 d)".

Description

Winding component

Technical Field

The present invention relates to a winding member, and more particularly, to a winding member in which a plurality of windings are wound simultaneously.

Background

Conventionally, a winding member having a winding structure (for example, bifilar winding) in which a plurality of windings are simultaneously wound around a bobbin is known (see fig. 3(a) of patent document 1). Here, 4 wires extend downward from the bobbin, and 2

wires

2 and 3 adjacent to each other on the left side (the reference symbol is still used in patent document 1) are the winding start ends of the windings, and 2

wires

2 and 3 adjacent to each other on the right side are the winding end ends of the windings.

[ Prior art documents ]

Patent document

Patent document 1: japanese laid-open patent publication No. 8-306550

Disclosure of Invention

[ problem to be solved by the invention ]

However, in the winding member described in patent document 1, when a plurality of windings are wound around the bobbin at the same time by the automatic winding machine, it is necessary to secure an insulation distance between the terminals provided on the bobbin and the distance between the terminals (the distance between the terminals connected to the winding start end wire and the distance between the terminals connected to the winding end wire). However, when the insulation distance is to be secured, the distance between the terminals is limited by the width of the gap between the respective nozzle portions of the winding drawn out of the automatic winding machine, and therefore, the insulation distance is required between the terminals to which different windings are connected, and it is necessary to provide an insulation portion between the terminals, respectively.

The present invention has been made to solve such problems, and an object of the present invention is to provide a winding member capable of reducing an installation area even when a plurality of windings are simultaneously wound by an automatic winding machine.

[ means for solving the problems ]

In order to solve the above problems, the present invention is characterized in that a first terminal and a second terminal protrude from a bobbin by at least 2 pieces, wherein the first terminal is connected to a first winding, the second terminal is connected to a second winding to be insulated from the first winding, and the terminals are arranged in such a manner that: the order of the first terminal → the second terminal is arranged in one row.

The positional relationship of the nozzles (the interval between the nozzles) in the automatic winding machine is fixed in advance, and a plurality of windings are simultaneously wound while maintaining the positional relationship. By utilizing this characteristic and providing the terminal arrangement as described above, a winding member having a small mounting area can be configured while maintaining the distance between the nozzles of the automatic winding machine. That is, by arranging the first terminals connected to the first winding and the second terminals connected to the second winding in a row in this order, the distance between the terminals connecting the first terminals of the same winding (first winding) or the second terminals of the same winding (second winding) can be minimized and improved, and thus, the winding member can be reduced in size. That is, for example, since the inter-terminal distance between the "first terminal connected to the first winding corresponding to the winding start end" and the "second terminal connected to the second winding corresponding to the winding start end" and the inter-terminal distance between the "first terminal connected to the first winding corresponding to the winding end" and the "second terminal connected to the second winding corresponding to the winding end" can be designed to be small values, respectively, a winding component having a small mounting area can be configured. In other words, by arranging the terminals as described above, it is possible to use two adjacent terminals as the terminals corresponding to the winding start end (or the winding end), and the nozzle of the automatic winding machine is arranged such that other terminals are always positioned between the corresponding terminals. In addition, the arrangement of the terminals realizes that the number of insulation portions between the terminals to which different windings are connected is smaller than that in the prior art, thereby enabling the winding member itself to be downsized, and thus contributing to a reduction in the mounting area.

In addition, when 2 of the first terminals in the terminal array are set as a first terminal group and 2 of the second terminals are set as a second terminal group, an insulating portion for securing an insulating distance between the first terminal group and the second terminal group is arranged on the bobbin.

With this configuration, since the insulating portion is provided between the first terminal group and the second terminal group, that is, between the first terminal connected to the first winding and the second terminal connected to the second winding, a sufficient insulation distance (creepage distance and/or space distance) can be ensured, the distance between the two terminal groups can be reduced, and as a result, a winding member having a smaller mounting area can be configured.

Further, in addition to the first terminal connected to the first winding and the second terminal connected to the second winding, at least 2 terminals up to an nth terminal protrude from the bobbin, respectively, and the arrangement of these terminals is arranged in a row in the order of "… → an n-2 nd terminal → an n-1 th terminal → an nth terminal" in which the terminals up to the nth terminal are connected to all of the windings up to the nth that are required to be insulated from the first winding and the second winding, respectively (in which the windings up to the nth terminal are also required to be insulated from each other) "in accordance with the arrangement of claim 1.

As described above, the present invention can be similarly applied to the case where the third winding and the fourth winding … are wound up to the nth winding at the same time.

[ Effect of the invention ]

By applying the present invention, it is possible to provide a winding component capable of reducing the installation area even in the case where a plurality of windings are simultaneously wound by an automatic winding machine.

Drawings

Fig. 1 is a winding part to which a first embodiment of the present invention is applied, (a) is a perspective view, and (b) is a side view.

Fig. 2 is a schematic view of the bottom surface structure of the winding member, (a) is a schematic view of the bottom surface structure of the winding member of the first embodiment shown in fig. 1, and (b) and (c) are schematic views of the bottom surface structure showing other variations.

Fig. 3 is a winding part to which a second embodiment of the present invention is applied, (a) is a perspective view, and (b) is a side view.

Fig. 4 is a winding part to which a third embodiment of the present invention is applied, (a) is a perspective view, and (b) is a side view.

Description of the symbols

210. 310 transformers (winding parts)

113. 213, 313 bobbin

113a, 213a, 313a (bobbin) body

113b, 313b pillar parts

113c, 213c, 313c

113e, 312e, 313e stepped groove

113f, 213f, 313f magnetic core slot

114. 214 outer skirt

115. 215, 315 terminal

116. 216, 316 recess

117. 117-2, 117-3 insulating plate

217 fastener

317 insulating plate

L1, L2, L3, L4 straight line

TSI first terminal set

TS2 second terminal group

Detailed Description

An example of a winding member according to an embodiment of the present invention will be described below with reference to the drawings. Note that, in order to facilitate understanding of the drawings, the sizes and dimensions of the respective portions are exaggerated, and the portions do not necessarily coincide with actual products. In addition, when the drawings are viewed in the direction of the reference symbols, the direction is basically expressed as up, down, left, right, out of the plane of the paper, and in the plane of the paper.

Structure of winding parts

Fig. 1 shows a transformer (an example of a winding member) including a bobbin 113 and a winding or a core (not shown) attached to the bobbin 113.

The main constituent elements of the bobbin 113 are: a main body 113a having 8 terminals (115a to 115h) on the bottom surface thereof, a leg portion 113b positioned at the approximate center of the main body 113a and around which a winding (not shown) is wound, and a flange portion 113c positioned at the upper end of the leg portion 113 b. The column portion 113b is formed in a cylindrical shape having a hollow portion 113d in the vertical direction. The core is attached so as to sandwich the pillar portion 113b from above and below (see fig. 3), and a part of the core (e.g., a center pillar of an E-core) is inserted into the hollow portion 113d in the pillar portion 113 b. The core is attached along the direction of the stepped groove 113e provided in the flange portion 113c (first direction: L3 direction).

The main body 113a is formed with a core groove 113f into which the core is inserted so as to be oriented in the same direction (L3) as the stepped groove 113e in the flange 113 c. Further, a total of 2 rows (L1, L2) of 8 terminals 115a to 115f are provided on both sides of the core groove 113f so that the four terminals are linearly arranged in a row, respectively, with the core groove 113f being a boundary.

On the outside of the paper surface of the core slot 113f in fig. 1, 4

terminals

115a, 115b, 115c, and 115d are arranged in 1 row (L1), of which 2

terminals

115a and 115b on the left side are first terminals connected to a first winding (winding start end and winding end), and 2

terminals

115c and 115d on the right side are second terminals connected to a second winding (winding start end and winding end which need to be insulated from the first winding). That is, the arrangement of the terminals is arranged in one row in the order of "first terminal 115a (one first terminal) → first terminal 115b (another first terminal) → second terminal 115c (one second terminal) → second terminal 115d (another second terminal)" (L1).

Further, 4

terminals

115e, 115f, 115g, and 115h are also arranged in a row (L2) inside the paper surface of the core slot 113f in fig. 1, of which 2

terminals

115e and 115f on the left side are first terminals (winding start end and winding end) connectable to a first winding, and 2

terminals

115g and 115h on the right side are second terminals (winding start end and winding end) connectable to a second winding (which needs to be insulated from the first winding). That is, here, the arrangement of the terminals is also arranged in a row (L2) in the order of "first terminal 115e → first terminal 115f → second terminal 115g → second terminal 115 h" (please refer to fig. 2(a) as well).

When 2

first terminals

115a and 115b arranged along L1 are set as a first terminal group TS1 and 2

second terminals

115c and 115d are set as a second terminal group TS2, recesses (first insulating portions) 116 are provided in the main body portion 113a of the bobbin 113 along a direction L4 (second direction: a direction substantially perpendicular to L1, L2, and L3 in the present embodiment) different from the direction L1 (and L2 and L3) between the first terminal group TS1 and the second terminal group TS 2. The recess 116 is formed so as to open on the bottom side of the bobbin 113 (so as to be recessed upward from the bottom), that is, so as to turn the "concave" upside down. In addition, in the recess 116, a plate-shaped insulating plate (first insulating member) 117 is provided perpendicularly from the recess bottom surface 116a in the same direction L4 as the recess 116. The insulating plate 117 extends to a length substantially equal to the lower end of the outer skirt 114 that abuts against a surface of a substrate (not shown) when the bobbin 113 is placed on the substrate, and the lower end surface of the insulating plate 117 abuts against the substrate when the bobbin 113 is attached to the substrate. The shape of the groove is also included in the shape of the "concave" character upside down.

As shown in fig. 1 b, the terminals are arranged such that the inter-terminal distance W1 between the first terminal 115a (one first terminal) and the second terminal 115c (one second terminal) is the same as the inter-terminal distance W2 between the first terminal 115b (the other first terminal) and the second terminal 115d (the other second terminal). Thereby, a plurality of (2 in this case) windings can be wound at the same time by the automatic winding machine. That is, when the first terminal 115a is selected as the terminal of the winding start end of the first winding, the second terminal 115c is selected as the terminal of the winding start end of the second winding, the first terminal 115b is selected as the winding end terminal of the first winding, and the second terminal 115d is selected as the winding end terminal of the second winding. That is, the automatic winding machine corresponds to the winding start end to the first terminal 115a and the second terminal 115c that secure the inter-terminal distance W1, and corresponds to the winding end to the first terminal 115b and the second terminal 115d that secure the inter-terminal distance W2 (the same as the inter-terminal distance W1), thereby securing a sufficient inter-terminal distance. In other words, by reducing the inter-terminal distances W1 and W2 to the limit that can be met by the nozzle of the automatic winding machine, the mounting area of the bobbin 113 as a winding member can be reduced. It is needless to say that the terminal of the winding start end and the terminal of the winding end may be reversed to correspond to the automatic winding machine.

In addition, since the first terminal 115a and the first terminal 115b are the winding start end and the winding end of the same winding (first winding), the distance between the terminals can be a minimum value and good. Similarly, since the second terminal 115c and the second terminal 115d are also the same winding (second winding), the distance between the terminals can be a minimum value and good. Therefore, for the

first terminals

115a and 115b and the

second terminals

115c and 115d, the terminals can be arranged so that the inter-terminal distance is reduced to a limit value that the nozzle of the automatic winding machine can correspond to. That is, the winding component itself can be reduced in size and the mounting area can be reduced because the insulating means such as the concave portion (insulating portion) 116 or the insulating plate (insulating portion) 117 described in the present embodiment is provided between the first terminal 115b and the second terminal 115c to which different windings are connected.

In this way, in the present invention, the first terminal 115a connected to the first winding and the

second terminals

115c and 115d connected to the second winding to be insulated from the first winding protrude from the bobbin 113 by at least 2, and the arrangement of these terminals is arranged in a row in the order of "first terminal 115a → first terminal 115b → second terminal 115c → second terminal 115 d" (L1).

The positional relationship of the nozzles (the interval between the nozzles) in the automatic winding machine is fixed in advance, and a plurality of windings are simultaneously wound while maintaining the positional relationship. By utilizing this characteristic and providing the terminal arrangement as described above, the winding member having a small mounting area can be configured while maintaining the distance between the nozzles of the automatic winding machine as it is. That is, by arranging the

first terminals

115a and 115b connected to the first winding and the

second terminals

115c and 115d connected to the second winding in a row in the order mentioned above, the distance between the terminals of the first terminals connected to the same winding (first winding) or the second terminals connected to the same winding (second winding) can be minimized and improved, and therefore, the winding member itself can be downsized. That is, for example, since the inter-terminal distance W1 of the "first terminal 115a connected to the first winding corresponding to the winding start end" and the "second terminal 115c connected to the second winding corresponding to the winding start end", and the inter-terminal distance W2 of the "first terminal 115b connected to the first winding corresponding to the winding end" and the "second terminal 115d connected to the second winding corresponding to the winding end" can be designed to be small values, respectively, a winding component having a small mounting area can be configured.

When 2 of the

first terminals

115a and 115b in the terminal array are set as the first terminal group TS1 and 2 of the

second terminals

115c and 115d are set as the second terminal group TS2, the bobbin 113 is provided with the recess 116 and the insulating plate 117 for securing an insulating distance (creepage distance and/or space distance) between the first terminal group TS1 and the second terminal group TS 2.

With such a configuration, a sufficient insulation distance (creeping distance and/or space distance) can be secured between the first terminal group TS1 and the second terminal group TS2, that is, between the

first terminals

115a and 115b connected to the first winding and the

second terminals

115c and 115d connected to the second winding, and therefore, the distance between the terminal groups TS1 and TS2 can be designed to be small, and as a result, a winding component having a smaller mounting area can be configured.

Further, the number of windings wound simultaneously by the automatic winding machine is not necessarily only 2, and there are cases where 3 or more windings are wound simultaneously, and the present invention can be applied to such cases. For example, as shown as an example in fig. 2(b), in addition to the

first terminals

115a and 115b connected to the first winding and the

second terminals

115c and 115d connected to the second winding, there are provided

third terminals

115i and 115j connected to "all the windings up to the third which need to be insulated from the first winding and the second winding", respectively, which protrude at least 2, and the arrangement of these terminals is arranged in a row in the order of "first terminal 115a → first terminal 115b → second terminal 115c → second terminal 115d → third terminal 115i → third terminal 115 j", whereby the same effect can be exhibited even when there are 3 windings. Further, when 2

first terminals

115a and 115b are used as the first terminal group TS1, 2

second terminals

115c and 115d are used as the second terminal group TS2, and 2

third terminals

115i and 115j are used as the third terminal group TS3, if the concave portions (116 and 116-2) and the insulating plates (117 and 117-2) are disposed between the terminal groups, a sufficient insulation distance (creepage distance and/or space distance) between the terminal groups can be secured.

Further, for example, as shown as an example in fig. 2(c), in addition to the

first terminals

115a and 115b connected to the first winding and the

second terminals

115c and 115d connected to the second winding, there are provided at least 2

third terminals

115i and 115j and fourth terminals 115k and 115l connected to "all the fourth to fourth windings required to be insulated from the first winding and the second winding", respectively, and the arrangement of these terminals is arranged in a row in the order of "the first terminal 115a → the first terminal 115b → the second terminal 115c → the second terminal 115d → the third terminal 115i → the third terminal 115j → the fourth terminal 115k → the fourth terminal 115 l", whereby the same effect can be exerted even when there are 4 windings. Further, when 2

first terminals

115a and 115b are set as the first terminal group TS1, 2

second terminals

115c and 115d are set as the second terminal group TS2, 2

third terminals

115i and 115j are set as the third terminal group TS3, and 2 fourth terminals 115k and 115l are set as the fourth terminal group TS4, if the concave portions (116, 116-2 and 116-3) and the insulating plates (117, 117-2 and 117-3) are disposed between the terminal groups, a sufficient insulation distance (creepage distance and/or space distance) between the terminal groups can be secured, and therefore, the distance between the terminal groups can be designed to be small, and as a result, a winding component having a smaller mounting area can be configured.

As described above, the present invention can be similarly applied to the case where the windings from the third winding … to the nth winding are wound at the same time. That is, in the case of having the windings up to the nth, the arrangement of the terminals is arranged in a row in the order of "… → the nth-2 terminal → the nth-1 terminal → the nth terminal". It is preferable that the insulating portions such as the concave portion 116 and/or the insulating plate 117 described in the present embodiment are provided between the n-2 th terminal and the n-1 th terminal and between the n-1 th terminal and the n-1 th terminal, for example, which need to be insulated.

Other constitution example

Fig. 3 shows another example of the structure of the "insulating section" disposed between the terminal groups TS1 and TS 2. In fig. 3, as an example of the winding member, a winding 212 and a core 211 are attached to a bobbin 213 to constitute a transformer 210.

The main constituent elements of the bobbin 213 are: a main body 213a having 8 terminals on the bottom surface, a support (not shown) located at the approximate center of the main body 213a and around which the winding 212 is wound, and a flange 213c located at the upper end of the support. The leg portion of the winding coil 212 is formed in a cylindrical shape having a hollow portion in the vertical direction. The core 211 is attached so as to sandwich the column portion from above and below, and is attached so as to insert a part of the core 211 (for example, the center column of the E-shaped core) into the hollow portion in the column portion. The core 211 is attached along the direction of the stepped groove 213e provided in the flange 213c (first direction: L3 direction).

The main body 213a has a core groove 213f into which the core 211 is inserted, so that the stepped groove 213e in the flange 213c is oriented in the same direction (L3). Further, a total of 8 terminals in 2 rows (L1, L2) are provided on both sides of the core groove 213f so that 4 terminals are linearly arranged in a row, respectively, with the core groove 213f being a boundary.

Outside the paper surface of the core slot 213f in fig. 3, 4

terminals

215a, 215b, 215c, and 215d are arranged in a row (L1), of which 2

terminals

215a and 215b on the left side are first terminals connected to the first winding (winding start end and winding end), and 2

terminals

215c and 215d on the right side are second terminals connected to the second winding (winding start end and winding end required to be insulated from the first winding). That is, the arrangement of the terminals is arranged in a row in the order of "first terminal 215a → first terminal 215b → second terminal 215c → second terminal 215 d" (L1).

Further, on the inner side of the paper surface of the core groove 213f in fig. 3, 4 terminals (the first terminal 215e, the first terminal 215f, the second terminal 215g, and the second terminal 215h) are arranged in 1 row (L2) as described above.

When 2

first terminals

215a and 215b arranged along L1 are set as the first terminal group TS1 and 2

second terminals

215c and 215d are set as the second terminal group TS2, the main body portion 213a of the bobbin 213 is provided with a recess (insulating portion) 216 in a direction L4 (second direction: a direction substantially perpendicular to L1, L2, and L3 in the present embodiment) different from L1 (and L2 and L3) between the first terminal group TS1 and the second terminal group TS 2. The concave portion 216 is formed so as to open on the bottom surface side of the bobbin 213 (so as to be recessed upward from the bottom surface), that is, so as to turn the "concave" upside down. The creepage distance between the first terminal group TS1 and the second terminal group TS2 is ensured by this recess 216. Further, for example, a plate-like member (not shown) may be combined with the locking portion 217 (the plate-like member reaches at least the surface of the substrate on which the transformer 210 is mounted), and a protrusion provided on the member (insulating member) may be locked to the locking portion 217, whereby a space distance may be secured without the member falling off.

As shown in fig. 3(b), the terminals are arranged such that the inter-terminal distance W1 between the first terminal 215a and the second terminal 215c is the same as the inter-terminal distance W2 between the first terminal 215b and the second terminal 215 d. Thereby, a plurality of (2 in this case) windings can be wound at the same time by the automatic winding machine. That is, when the first terminal 215a is selected as the terminal of the winding start end of the first winding, the second terminal 215c is selected as the terminal of the winding start end of the second winding, the first terminal 215b is selected as the winding end terminal of the first winding, and the second terminal 215d is selected as the winding end terminal of the second winding. That is, the automatic winding machine corresponds to the first terminal 215a and the second terminal 215c, which secure the inter-terminal distance W1, and corresponds to the winding start end, and corresponds to the first terminal 215b and the second terminal 215d, which secure the inter-terminal distance W2, thereby securing a sufficient inter-terminal distance. In other words, by reducing the inter-terminal distances W1 and W2 to the limit that can be met by the nozzle of the automatic winding machine, the mounting area of the bobbin 213 as the winding member can be reduced. It is needless to say that the terminal of the winding start end and the terminal of the winding end may be reversed to correspond to the automatic winding machine.

Fig. 4 shows another example of the structure of the "insulating section" disposed between the terminal groups TS1 and TS 2. In fig. 4, a transformer 310 is configured by attaching a core 311 to a bobbin 313 as an example of a winding member.

The main constituent elements of the bobbin 313 are: a main body portion 313a having 8 terminals on the bottom surface, a support portion 313b positioned at the approximate center of the main body portion 313a and around which a winding (not shown) is wound, and a flange portion 313c positioned at the upper end of the support portion 313 b. The winding-wound support portion 313b is formed in a cylindrical shape having a hollow portion in the vertical direction. The core 311 is attached so as to sandwich the column part 313b from above and below, and is attached so as to insert a part of the core 311 (for example, the center column of the E-shaped core) into the hollow part in the column part 313 b. The core 311 is attached along the direction of the stepped groove 313e provided in the flange portion 313c (first direction: L3 direction).

The main body portion 313a is formed with a core groove 313f into which the core 311 is inserted so that the stepped groove 313e of the flange portion 313c is oriented in the same direction (L3). Further, a total of 8 terminals (some terminals are not shown in the drawing) in 2 rows (L1, L2) are provided on both sides of the core groove 313f so that 4 terminals are linearly arranged in a row, respectively, with the core groove 313f being a boundary.

Outside the paper surface of the core slot 313f in fig. 4, 4

terminals

315a, 315b, 315c, 315d are arranged in a row (L1), of which 2

terminals

315a, 315b on the left side are first terminals connected to a first winding (winding start end and winding end), and 2

terminals

315c, 315d on the right side are second terminals connected to a second winding (winding start end and winding end, which need to be insulated from the first winding). That is, the arrangement of the terminals is arranged in a row in the order of "first terminal 315a → first terminal 315b → second terminal 315c → second terminal 315 d" (L1).

Further, on the inner side of the paper surface of the core groove 313f in fig. 4, 4 terminals are also arranged in 1 row (L2) as described above.

When 2

first terminals

315a and 315b arranged along L1 are referred to as a first terminal group TS1 and 2

second terminals

315c and 315d are referred to as a second terminal group TS2, a main body portion 313a of the bobbin 313 is provided with a recess (first insulating portion) 316 in a direction L4 (second direction: a direction substantially orthogonal to L1, L2, and L3 in the present embodiment) different from L1 (and L2 and L3) between the first terminal group TS1 and the second terminal group TS 2. The recess 316 is formed so as to open on the bottom side of the bobbin 313 (so as to be recessed upward from the bottom), that is, so as to turn the "concave" upside down. An insulating plate (insulating portion) 317 as another member is inserted into the recess 316. The insulating plate 317 is constituted as follows: the horizontal plate 317c is used as a base (the horizontal plate 317c is formed to have substantially the same size as the bottom surface area of the main body portion 313a of the bobbin 313), and has an upper side wall portion 317a capable of fitting into the recess 316 and an upper side block portion 317d capable of fitting into the core groove 313f on the upper surface side thereof, and a lower side wall portion 317b having substantially the same size as the upper side wall portion 317a on the lower surface side thereof. The horizontal plate 317c is provided with terminal holes into which 8 terminals can be inserted, and is attached so that the terminals are inserted into the terminal holes, respectively. Further, locking portions (locking convex portions) are provided on both surfaces of the upper side wall portion 317a or both surfaces of the upper side block portion 317d, and locking portions (locking concave portions) are formed inside the concave portions 316 or inside the core grooves 313f, and by locking of the locking portions (locking convex portions and locking concave portions), occurrence of a trouble such as accidental detachment of the insulating plate 317 from the bobbin 313 is prevented. As shown in fig. 4(b), lower wall 317b is provided with a slit 322 on the side of substrate 320 on which transformer 310 is mounted, and is assembled to fit into slit 322.

With this configuration, the insulation distance (creeping distance and/or spatial distance) between the first terminal group TS1 and the second terminal group TS2 can be ensured even on the upper side (mounting surface side) of the board 320, and the insulation distance (creeping distance and/or spatial distance) between the first terminal group TS1 and the second terminal group TS2 can be ensured even on the lower side (soldering surface) of the board 320.

As shown in fig. 4(b), the terminals are arranged such that the inter-terminal distance W1 between the first terminal 315a and the second terminal 315c is the same as the inter-terminal distance W2 between the first terminal 315b and the second terminal 315 d. Thereby, a plurality of (2 in this case) windings can be wound at the same time by the automatic winding machine. That is, when the first terminal 315a is selected as the terminal of the winding start end of the first winding, the second terminal 315c is selected as the terminal of the winding start end of the second winding, the first terminal 315b is selected as the winding end terminal of the first winding, and the second terminal 315d is selected as the winding end terminal of the second winding. That is, the automatic winding machine corresponds to the winding start end to the first terminal 315a and the second terminal 315c securing the inter-terminal distance W1, and corresponds to the winding end to the first terminal 315b and the second terminal 315d securing the inter-terminal distance W2, thereby securing a sufficient inter-terminal distance. In other words, by reducing the inter-terminal distances W1 and W2 to the limit that can be met by the nozzle of the automatic winding machine, the mounting area of the bobbin 313 as the winding member can be reduced. It is needless to say that the terminal of the winding start end and the terminal of the winding end may be reversed to correspond to the automatic winding machine.

Claims

1. A winding part, characterized in that,

a first terminal and a second terminal protrude from the bobbin at least 2 each, wherein the first terminal is connected to a first winding and the second terminal is connected to a second winding to be insulated from the first winding,

the terminals are arranged in accordance with

The order of the first terminal → the second terminal is arranged in a column,

when 2 first terminals in the terminal array are set as a first terminal group and 2 second terminals are set as a second terminal group,

an insulating portion for securing an insulating distance between the first terminal group and the second terminal group is arranged on the bobbin,

the insulating part has:

a recess formed to be recessed upward from a bottom surface of the bobbin and present between the first terminal group and the second terminal group; and

a plate-shaped insulating plate which is provided inside the recess from a bottom surface of the recess and in the same direction as the recess, and which is present between the first terminal group and the second terminal group,

the insulating plate protrudes downward in a direction in which the first terminal and the second terminal extend than a bottom surface of the bobbin, and is present between the first terminal group and the second terminal group.

2. Winding part according to claim 1,

outside of the first terminal connected to the first winding and the second terminal connected to the second winding,

the terminals up to the nth terminal also protrude from the bobbin by at least 2 pieces,

the arrangement of the terminals being subsequent to that of claim 1, in accordance with

… → the n-2 terminal → the n-1 terminal → the n terminal

Is arranged as a column, wherein,

the terminals up to the nth terminal are connected to all the windings up to the nth terminal, and all the windings up to the nth terminal need to be insulated from the first winding and the second winding, and the windings up to the nth terminal need to be insulated from each other.